Up to 1,000 wild horses will be rounded up from federal land in Northern California this month. The horses live inside the Modoc National Forest, which is near the Oregon border. mnn.com reports the roundup is set to begin October 9 and will continue throughout the month. Federal officials say the land cannot sustain the sheer size of the herd. The horses reportedly roam on more than 250,000 acres within the national forest.